Quarter	Billions of US Dollars
1967-04-01	0.02
1967-07-01	0.02
1967-10-01	0.02
1968-01-01	0.02
1968-04-01	0.02
1968-07-01	0.02
1968-10-01	0.02
1969-01-01	0.02
1969-04-01	0.02
1969-07-01	0.02
1969-10-01	0.02
1970-01-01	0.02
1970-04-01	0.02
1970-07-01	0.02
1970-10-01	0.02
1971-01-01	0.05
1971-04-01	0.05
1971-07-01	0.05
1971-10-01	0.10
1972-01-01	0.13
1972-04-01	0.13
1972-07-01	0.16
1972-10-01	0.23
1973-01-01	0.32
1973-04-01	0.36
1973-07-01	0.36
1973-10-01	0.34
1974-01-01	0.36
1974-04-01	0.35
1974-07-01	0.37
1974-10-01	0.39
1975-01-01	0.42
1975-04-01	0.43
1975-07-01	0.43
1975-10-01	0.44
1976-01-01	0.45
1976-04-01	0.52
1976-07-01	0.58
1976-10-01	0.74
1977-01-01	0.89
1977-04-01	1.09
1977-07-01	1.14
1977-10-01	1.30
1978-01-01	1.30
1978-04-01	1.52
1978-07-01	1.67
1978-10-01	1.69
1979-01-01	1.88
1979-04-01	2.03
1979-07-01	2.18
1979-10-01	2.20
1980-01-01	2.11
1980-04-01	2.48
1980-07-01	2.53
1980-10-01	2.49
1981-01-01	2.35
1981-04-01	2.34
1981-07-01	2.35
1981-10-01	2.52
1982-01-01	2.63
1982-04-01	2.88
1982-07-01	2.82
1982-10-01	3.00
1983-01-01	3.16
1983-04-01	3.24
1983-07-01	3.45
1983-10-01	3.85
1984-01-01	4.41
1984-04-01	4.09
1984-07-01	4.00
1984-10-01	4.59
1985-01-01	5.15
1985-04-01	5.67
1985-07-01	6.10
1985-10-01	6.40
1986-01-01	6.49
1986-04-01	6.76
1986-07-01	7.75
1986-10-01	7.37
1987-01-01	7.46
1987-04-01	6.84
1987-07-01	7.12
1987-10-01	8.08
1988-01-01	8.08
1988-04-01	7.94
1988-07-01	8.77
1988-10-01	9.60
1989-01-01	9.64
1989-04-01	9.18
1989-07-01	9.84
1989-10-01	10.54
1990-01-01	11.14
1990-04-01	12.39
1990-07-01	15.27
1990-10-01	16.41
1991-01-01	15.24
1991-04-01	15.34
1991-07-01	16.44
1991-10-01	19.02
1992-01-01	19.12
1992-04-01	22.87
1992-07-01	25.29
1992-10-01	23.43
1993-01-01	26.90
1993-04-01	31.09
1993-07-01	36.56
1993-10-01	37.56
1994-01-01	42.31
1994-04-01	45.37
1994-07-01	49.67
1994-10-01	52.07
1995-01-01	60.60
1995-04-01	62.19
1995-07-01	62.54
1995-10-01	64.86
1996-01-01	68.04
1996-04-01	69.98
1996-07-01	75.21
1996-10-01	79.59
1997-01-01	80.14
1997-04-01	82.90
1997-07-01	87.00
1997-10-01	87.86
1998-01-01	97.09
1998-04-01	103.52
1998-07-01	113.60
1998-10-01	117.06
1999-01-01	119.44
1999-04-01	129.70
1999-07-01	140.42
1999-10-01	143.76
2000-01-01	145.51
2000-04-01	151.91
2000-07-01	157.06
2000-10-01	163.40
2001-01-01	165.38
2001-04-01	168.34
2001-07-01	181.95
2001-10-01	189.49
2002-01-01	195.02
2002-04-01	226.45
2002-07-01	224.78
2002-10-01	240.98
2003-01-01	263.33
2003-04-01	290.68
2003-07-01	305.92
2003-10-01	354.64
2004-01-01	349.89
2004-04-01	355.32
2004-07-01	356.27
2004-10-01	403.90
2005-01-01	400.46
2005-04-01	410.63
2005-07-01	418.50
2005-10-01	463.45
2006-01-01	540.36
2006-04-01	616.64
2006-07-01	636.63
2006-10-01	692.72
2007-01-01	772.43
2007-04-01	839.17
2007-07-01	894.34
2007-10-01	942.16
2008-01-01	1002.56
2008-04-01	1064.06
2008-07-01	1006.16
2008-10-01	1004.54
2009-01-01	976.45
2009-04-01	1056.17
2009-07-01	1113.38
2009-10-01	1105.13
2010-01-01	1050.83
2010-04-01	966.02
2010-07-01	1086.13
2010-10-01	1066.76
2011-01-01	1151.61
2011-04-01	1188.36
2011-07-01	1132.06
2011-10-01	1097.09
2012-01-01	1190.04
2012-04-01	1113.10
2012-07-01	1134.55
2012-10-01	1165.70
2013-01-01	1127.93
2013-04-01	1129.38
2013-07-01	1129.99
2013-10-01	1167.00
2014-01-01	1146.52
2014-04-01	1145.47
2014-07-01	1057.57
2014-10-01	1004.36
2015-01-01	914.52
2015-04-01	933.58